[deliverable/linux.git] / arch / s390 / include / asm / kvm_para.h

/*
 * definition for paravirtual devices on s390
 *
 * Copyright IBM Corp. 2008
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 *
 *    Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
 */
/*
 * Hypercalls for KVM on s390. The calling convention is similar to the
 * s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
 * as hypercall number and R7 as parameter 6. The return value is
 * written to R2. We use the diagnose instruction as hypercall. To avoid
 * conflicts with existing diagnoses for LPAR and z/VM, we do not use
 * the instruction encoded number, but specify the number in R1 and
 * use 0x500 as KVM hypercall
 *
 * Copyright IBM Corp. 2007,2008
 * Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.
 */
#ifndef __S390_KVM_PARA_H
#define __S390_KVM_PARA_H

#include <uapi/asm/kvm_para.h>
#include <asm/diag.h>

static inline long __kvm_hypercall0(unsigned long nr)
{
	register unsigned long __nr asm("1") = nr;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr): "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall0(unsigned long nr)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall0(nr);
}

static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall1(nr, p1);
}

static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1,
			       unsigned long p2)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
		      : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
			       unsigned long p2)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall2(nr, p1, p2);
}

static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall3(nr, p1, p2, p3);
}

static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4) : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall4(nr, p1, p2, p3, p4);
}

static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register unsigned long __p5 asm("6") = p5;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4), "d" (__p5)  : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall5(nr, p1, p2, p3, p4, p5);
}

static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5,
			       unsigned long p6)
{
	register unsigned long __nr asm("1") = nr;
	register unsigned long __p1 asm("2") = p1;
	register unsigned long __p2 asm("3") = p2;
	register unsigned long __p3 asm("4") = p3;
	register unsigned long __p4 asm("5") = p4;
	register unsigned long __p5 asm("6") = p5;
	register unsigned long __p6 asm("7") = p6;
	register long __rc asm("2");

	asm volatile ("diag 2,4,0x500\n"
		      : "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
			"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
		      : "memory", "cc");
	return __rc;
}

static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
			       unsigned long p2, unsigned long p3,
			       unsigned long p4, unsigned long p5,
			       unsigned long p6)
{
	diag_stat_inc(DIAG_STAT_X500);
	return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6);
}

/* kvm on s390 is always paravirtualization enabled */
static inline int kvm_para_available(void)
{
	return 1;
}

/* No feature bits are currently assigned for kvm on s390 */
static inline unsigned int kvm_arch_para_features(void)
{
	return 0;
}

static inline bool kvm_check_and_clear_guest_paused(void)
{
	return false;
}

#endif /* __S390_KVM_PARA_H */
Commit	Line	Data
b0c632db	1	/*
a53c8fab	2	* definition for paravirtual devices on s390
b0c632db HC	3	*
	4	* Copyright IBM Corp. 2008
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License (version 2 only)
	8	* as published by the Free Software Foundation.
	9	*
	10	* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
	11	*/
b0c632db	12	/*
e976a2b9 CB	13	* Hypercalls for KVM on s390. The calling convention is similar to the
	14	* s390 ABI, so we use R2-R6 for parameters 1-5. In addition we use R1
	15	* as hypercall number and R7 as parameter 6. The return value is
	16	* written to R2. We use the diagnose instruction as hypercall. To avoid
	17	* conflicts with existing diagnoses for LPAR and z/VM, we do not use
	18	* the instruction encoded number, but specify the number in R1 and
	19	* use 0x500 as KVM hypercall
	20	*
	21	* Copyright IBM Corp. 2007,2008
	22	* Author(s): Christian Borntraeger <borntraeger@de.ibm.com>
	23	*
	24	* This work is licensed under the terms of the GNU GPL, version 2.
b0c632db	25	*/
9807f759 DH	26	#ifndef __S390_KVM_PARA_H
	27	#define __S390_KVM_PARA_H
	28
	29	#include <uapi/asm/kvm_para.h>
1ec2772e	30	#include <asm/diag.h>
9807f759	31
1ec2772e	32	static inline long __kvm_hypercall0(unsigned long nr)
e976a2b9 CB	33	{
	34	register unsigned long __nr asm("1") = nr;
	35	register long __rc asm("2");
	36
	37	asm volatile ("diag 2,4,0x500\n"
	38	: "=d" (__rc) : "d" (__nr): "memory", "cc");
	39	return __rc;
	40	}
	41
1ec2772e MS	42	static inline long kvm_hypercall0(unsigned long nr)
	43	{
	44	diag_stat_inc(DIAG_STAT_X500);
	45	return __kvm_hypercall0(nr);
	46	}
	47
	48	static inline long __kvm_hypercall1(unsigned long nr, unsigned long p1)
e976a2b9 CB	49	{
	50	register unsigned long __nr asm("1") = nr;
	51	register unsigned long __p1 asm("2") = p1;
	52	register long __rc asm("2");
	53
	54	asm volatile ("diag 2,4,0x500\n"
	55	: "=d" (__rc) : "d" (__nr), "0" (__p1) : "memory", "cc");
	56	return __rc;
	57	}
	58
1ec2772e MS	59	static inline long kvm_hypercall1(unsigned long nr, unsigned long p1)
	60	{
	61	diag_stat_inc(DIAG_STAT_X500);
	62	return __kvm_hypercall1(nr, p1);
	63	}
	64
	65	static inline long __kvm_hypercall2(unsigned long nr, unsigned long p1,
e976a2b9 CB	66	unsigned long p2)
	67	{
	68	register unsigned long __nr asm("1") = nr;
	69	register unsigned long __p1 asm("2") = p1;
	70	register unsigned long __p2 asm("3") = p2;
	71	register long __rc asm("2");
	72
	73	asm volatile ("diag 2,4,0x500\n"
	74	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2)
	75	: "memory", "cc");
	76	return __rc;
	77	}
	78
1ec2772e MS	79	static inline long kvm_hypercall2(unsigned long nr, unsigned long p1,
	80	unsigned long p2)
	81	{
	82	diag_stat_inc(DIAG_STAT_X500);
	83	return __kvm_hypercall2(nr, p1, p2);
	84	}
	85
	86	static inline long __kvm_hypercall3(unsigned long nr, unsigned long p1,
e976a2b9 CB	87	unsigned long p2, unsigned long p3)
	88	{
	89	register unsigned long __nr asm("1") = nr;
	90	register unsigned long __p1 asm("2") = p1;
	91	register unsigned long __p2 asm("3") = p2;
	92	register unsigned long __p3 asm("4") = p3;
	93	register long __rc asm("2");
	94
	95	asm volatile ("diag 2,4,0x500\n"
	96	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	97	"d" (__p3) : "memory", "cc");
	98	return __rc;
	99	}
	100
1ec2772e MS	101	static inline long kvm_hypercall3(unsigned long nr, unsigned long p1,
	102	unsigned long p2, unsigned long p3)
	103	{
	104	diag_stat_inc(DIAG_STAT_X500);
	105	return __kvm_hypercall3(nr, p1, p2, p3);
	106	}
e976a2b9	107
1ec2772e	108	static inline long __kvm_hypercall4(unsigned long nr, unsigned long p1,
e976a2b9 CB	109	unsigned long p2, unsigned long p3,
	110	unsigned long p4)
	111	{
	112	register unsigned long __nr asm("1") = nr;
	113	register unsigned long __p1 asm("2") = p1;
	114	register unsigned long __p2 asm("3") = p2;
	115	register unsigned long __p3 asm("4") = p3;
	116	register unsigned long __p4 asm("5") = p4;
	117	register long __rc asm("2");
	118
	119	asm volatile ("diag 2,4,0x500\n"
	120	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	121	"d" (__p3), "d" (__p4) : "memory", "cc");
	122	return __rc;
	123	}
	124
1ec2772e MS	125	static inline long kvm_hypercall4(unsigned long nr, unsigned long p1,
	126	unsigned long p2, unsigned long p3,
	127	unsigned long p4)
	128	{
	129	diag_stat_inc(DIAG_STAT_X500);
	130	return __kvm_hypercall4(nr, p1, p2, p3, p4);
	131	}
	132
	133	static inline long __kvm_hypercall5(unsigned long nr, unsigned long p1,
e976a2b9 CB	134	unsigned long p2, unsigned long p3,
	135	unsigned long p4, unsigned long p5)
	136	{
	137	register unsigned long __nr asm("1") = nr;
	138	register unsigned long __p1 asm("2") = p1;
	139	register unsigned long __p2 asm("3") = p2;
	140	register unsigned long __p3 asm("4") = p3;
	141	register unsigned long __p4 asm("5") = p4;
	142	register unsigned long __p5 asm("6") = p5;
	143	register long __rc asm("2");
	144
	145	asm volatile ("diag 2,4,0x500\n"
	146	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	147	"d" (__p3), "d" (__p4), "d" (__p5) : "memory", "cc");
	148	return __rc;
	149	}
	150
1ec2772e MS	151	static inline long kvm_hypercall5(unsigned long nr, unsigned long p1,
	152	unsigned long p2, unsigned long p3,
	153	unsigned long p4, unsigned long p5)
	154	{
	155	diag_stat_inc(DIAG_STAT_X500);
	156	return __kvm_hypercall5(nr, p1, p2, p3, p4, p5);
	157	}
	158
	159	static inline long __kvm_hypercall6(unsigned long nr, unsigned long p1,
e976a2b9 CB	160	unsigned long p2, unsigned long p3,
	161	unsigned long p4, unsigned long p5,
	162	unsigned long p6)
	163	{
	164	register unsigned long __nr asm("1") = nr;
	165	register unsigned long __p1 asm("2") = p1;
	166	register unsigned long __p2 asm("3") = p2;
	167	register unsigned long __p3 asm("4") = p3;
	168	register unsigned long __p4 asm("5") = p4;
	169	register unsigned long __p5 asm("6") = p5;
	170	register unsigned long __p6 asm("7") = p6;
	171	register long __rc asm("2");
	172
	173	asm volatile ("diag 2,4,0x500\n"
	174	: "=d" (__rc) : "d" (__nr), "0" (__p1), "d" (__p2),
	175	"d" (__p3), "d" (__p4), "d" (__p5), "d" (__p6)
	176	: "memory", "cc");
	177	return __rc;
	178	}
	179
1ec2772e MS	180	static inline long kvm_hypercall6(unsigned long nr, unsigned long p1,
	181	unsigned long p2, unsigned long p3,
	182	unsigned long p4, unsigned long p5,
	183	unsigned long p6)
	184	{
	185	diag_stat_inc(DIAG_STAT_X500);
	186	return __kvm_hypercall6(nr, p1, p2, p3, p4, p5, p6);
	187	}
	188
e976a2b9	189	/* kvm on s390 is always paravirtualization enabled */
b0c632db HC	190	static inline int kvm_para_available(void)
b0c632db HC	191	{
e976a2b9	192	return 1;
b0c632db HC	193	}
b0c632db HC	194
e976a2b9	195	/* No feature bits are currently assigned for kvm on s390 */
b0c632db HC	196	static inline unsigned int kvm_arch_para_features(void)
	197	{
	198	return 0;
	199	}
	200
3b5d56b9 EM	201	static inline bool kvm_check_and_clear_guest_paused(void)
	202	{
	203	return false;
	204	}
	205
b0c632db	206	#endif /* __S390_KVM_PARA_H */